Article in the Stanford Encyclopaedia of Philosophy, by Eric Hammer.
An essay at Abelard.org outlining an argument against Aristotelian syllogistic.
An online textbook by Garth Kemerling, explaining the basic elements of elementary logic at an unde...
Online resources provided to supplement undergraduate course taught by Peter Suber. Good collection...
An introductory guide by Peter Suber.
Article in the Stanford Encylcopaedia of Philosophy, entitled `Frege's Logic, Theorem, and Foundati...
Jay VerLinden's resource offering reviews and tests on important concepts in formal logic.